<?php

/**
 * UserIdentity represents the data needed to identity a user.
 * It contains the authentication method that checks if the provided
 * data can identity the user.
 */
class UserIdentity extends CUserIdentity
{
	/**
	 * Authenticates a user.
	 * The example implementation makes sure if the username and password
	 * are both 'demo'.
	 * In practical applications, this should be changed to authenticate
	 * against some persistent user identity storage (e.g. database).
	 * @return boolean whether authentication succeeds.
	 */
         
        public $_id;
	public function authenticate()
	{       
		$user = SystemAccountModel::model()->findByAttributes(array('username'=>$this->username));
                
		if($user===null)
                    $this->errorCode=self::ERROR_USERNAME_INVALID;
                else if($user->password!== $this->password)
                    $this->errorCode=self::ERROR_PASSWORD_INVALID;
                else
                {
                    $this->_id=$user->id;
                    $this->setState('id', $user->id);
                    $this->errorCode=self::ERROR_NONE;
                }
                return !$this->errorCode;
	}
        
        public function getId()
        {
            return $this->_id;
        }
}